Table of contents
Installer reference guide
2
RXTJ-A_RXTA-C_RXTM-A_RXTP-A
R32 split series
4P728168-1 – 2023.03
Table of contents
1 About the documentation 4
1.1 About this document ...................................................................................................................................................... 4
1.1.1 Meaning of warnings and symbols ................................................................................................................ 5
2 General safety precautions 7
2.1 For the installer............................................................................................................................................................... 7
2.1.1 General ........................................................................................................................................................... 7
2.1.2 Installation site ............................................................................................................................................... 8
2.1.3 Refrigerant — in case of R410A or R32.......................................................................................................... 11
2.1.4 Electrical ......................................................................................................................................................... 12
3 Specific installer safety instructions 15
4 About the box 21
4.1 Outdoor unit ................................................................................................................................................................... 21
4.1.1 To unpack the outdoor unit ........................................................................................................................... 21
4.1.2 To handle the outdoor unit............................................................................................................................ 21
4.1.3 To remove the accessories from the outdoor unit........................................................................................ 22
5 About the unit 23
5.1 Identification ................................................................................................................................................................... 23
5.1.1 Identification label: Outdoor unit .................................................................................................................. 23
6 Unit installation 24
6.1 Preparing the installation site......................................................................................................................................... 24
6.1.1 Installation site requirements of the outdoor unit........................................................................................ 25
6.1.2 Additional installation site requirements of the outdoor unit in cold climates............................................ 27
6.2 Opening the unit ............................................................................................................................................................. 28
6.2.1 About opening the unit .................................................................................................................................. 28
6.2.2 To open the outdoor unit............................................................................................................................... 28
6.3 Mounting the outdoor unit............................................................................................................................................. 28
6.3.1 About mounting the outdoor unit ................................................................................................................. 28
6.3.2 Precautions when mounting the outdoor unit.............................................................................................. 29
6.3.3 To provide the installation structure ............................................................................................................. 29
6.3.4 To install the outdoor unit ............................................................................................................................. 29
6.3.5 To provide drainage........................................................................................................................................ 30
7 Piping installation 31
7.1 Preparing refrigerant piping ........................................................................................................................................... 31
7.1.1 Refrigerant piping requirements.................................................................................................................... 31
7.1.2 Refrigerant piping insulation.......................................................................................................................... 32
7.1.3 Refrigerant piping length and height difference ........................................................................................... 32
7.2 Connecting the refrigerant piping .................................................................................................................................. 32
7.2.1 About connecting the refrigerant piping ....................................................................................................... 33
7.2.2 Precautions when connecting the refrigerant piping.................................................................................... 33
7.2.3 Guidelines when connecting the refrigerant piping...................................................................................... 34
7.2.4 Pipe bending guidelines ................................................................................................................................. 35
7.2.5 To flare the pipe end ...................................................................................................................................... 35
7.2.6 Using the stop valve and service port............................................................................................................ 36
7.2.7 To connect the refrigerant piping to the outdoor unit ................................................................................. 37
7.3 Checking the refrigerant piping...................................................................................................................................... 38
7.3.1 About checking the refrigerant piping........................................................................................................... 38
7.3.2 Precautions when checking the refrigerant piping........................................................................................ 38
7.3.3 To check for leaks ........................................................................................................................................... 39
7.3.4 To perform vacuum drying............................................................................................................................. 39
8 Charging refrigerant 41
8.1 About charging refrigerant ............................................................................................................................................. 41
8.2 About the refrigerant...................................................................................................................................................... 42
8.3 Precautions when charging refrigerant.......................................................................................................................... 43
8.4 To determine the additional refrigerant amount .......................................................................................................... 43
8.5 To determine the complete recharge amount .............................................................................................................. 43
8.6 To charge additional refrigerant..................................................................................................................................... 43
8.7 To check refrigerant piping joints for leaks after charging refrigerant ......................................................................... 44
8.8 To fix the fluorinated greenhouse gases label ............................................................................................................... 44
9 Electrical installation 45
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